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The VGT composites are surface reflectance measurements free of residual errors (i.e., effects not representing the surface under uniform illumination and viewing conditions) as possible. Measurements are normalized to nadir-viewed images obtained under cloud-free conditions. The data sets portray land surface features only, without being obscured by interfering effects. The product is used in various land cover, environmental monitoring and climate change studies, for generating specialized spatial data products such as detailed land cover and biophysical parameter maps of Fraction of Photosynthetically Active Radiation (FPAR), Leaf Area Index (LAI) required for vegetated land cover studies. (<http://www.ccrs.nrcan.gc.ca/ccrs/rd/apps/landcov/veg/emveg_e.html&gt;).